Books – strips – and leaves – Strips – With platen
Patent
1977-04-07
1979-02-06
Grieb, William H.
Books, strips, and leaves
Strips
With platen
40533, 40534, 281 16, G09B 112
Patent
active
041376501
ABSTRACT:
A teaching aid providing text for a spoken commentary by a teacher and transparencies for simultaneous illustrative visual display, said aid comprising a loose-leaf binder of folded sheet material to form an enclosing case, means on adjacent folded flaps thereof to secure the case, loose-leaf binding means in the case, a stack of envelopes and an adjacent stack of text volumes mounted to said binding means, said volumes of text being arranged in a predetermined sequence, and a plurality of transparencies each removably accommodated within a respective one of said stack of envelopes and being arranged in said stack in the same sequence as said volumes of text.
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patent: 3438703 (1969-04-01), Winnemann
patent: 4043053 (1977-08-01), Kaye
Clarendon Press Pty. Limited
Grieb William H.
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